Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Seeing a friend in a dream indicates joy, delight, and help. Whoever sees his friend in good appearance, it indicates the good state of the dreamer.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The friend indicates the mirror in which a person sees himself. Whatever good or bad he sees in him reflects on himself.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Seeing a friend is interpreted as goodness and benefit. Disputing with him indicates separation or misunderstanding.